Aluminum forms a layer of aluminum oxide when exposed to air which protects the bulk metal from further corrosion. 4 al(s) + 3 o2(g) latex: \rightarrow → 2 al2o3(s) using the thermodynamic data provided below, calculate latex: \delta δs° for this reaction.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.

What is the difference between a substance "getting wet" and "being dissolved" in a liquid at the particulate level?

My plate recommends that of your nutritional intake comes from fruits and vegetables. a. 30% b. 50% c. 20% d. 40%